Rock-drill.



UNITED STATES; PATENT onirica.

CHARLES C. HANSEN, 0F EASTON, PENNSYLVANIA, ASSIGNOR TojINGERSoLL-RANDCOMPANY, 'oF NEW YORK, N. Y., A CORPORATIONOF NEW JERSEY;

CH-DRILL.

Be it known am 1,-;emnLES'e. 'nissan a citizen ofthe United.StateS,'andresident of Easton, 1n the `county-.fof Northampton and StateofsPennsylvania, have .invented a new and useful Improvement in Rock#oil reservoir being incom'niunication with the' pistonl chamber.

The object :of`v this 'finve'ntionjisinore parmonly exists between thecylinder guides 'at the bottom -o-f the cylinder asian oil reservoir'byextending -.a.bottom'for'the reservoir` between :said guides thereby'not only utiliiingA the 'space lals vmentioned above butv represents'in longitudinal vertical seetionjso much -of-'a rockdrillc 'linderasjwillrg'ive aclear `understanding o in-y invention. ,Fig-

2`is a cross section taken inthe'plane of the line A-A. of Figf1'-',-Fig, 3 isadetailplanA view showing the separate flillingand ventvholes for the reservoir, 'and' F and 5 are detail longitudinal sectionsshowing. modifiedf'forms of *the means for establish-` ingcommunicationvbetweenthe reservoir.

and the'piston chamber. l

. The cylinder denoted guides by" 2, .3, .andits lsupporting shell by 4.A horizontal partition vsextends longitudinally of the eylinderbetweenthe guides 2 and 3, Said-.partition forming' the bottom for an oilreservoir 6. Transverse partitions'7 and S Serve as front and back Wallsrespectively of the oil reservoir 6.

'of the piston 9 as the piston approaches the limits of its forward andbackward strokes. A spring pressed valve .is preferably provided fornormally closing this port 11t which valve may' be made in variousforms.

For instance, in the form shown in Figs. 1 l' and 2.a cup-Shaped valve13 is shoirn as Y Y specification pf Letters Pa-tent. vmamme-n md my7,11911.

by 1 and Patented J nly 8, -1913.

Serial No. 637,277.

mountedin a plugr llsciewed into the'hottom v5 of the reservoir,- aspring 15 being provided. for holding the Val-ve 13fclosed.' ,he innerend of the plug Iltis preferably *j screwed into tight engagementwith, avlng 16 `on the inner-cylinder wall, channels" 17 be-. ing provided forbringing'the"interior of thereservoir into communication with the l'portl1 when the valve is opened. IIL-Fig;

4 a spring pressed ball valve 1S is shown in-4 l. stead of the cupvalve.13 shown in Fig. 1,.

In` Fig; 5 no valve is'shown .at all for this y port 11.

The meansn'forjfilling the'reseriv'oir shovn herelncomprises a fillinghole 19 in the 4top of the cylinder ,at one-.sidel thereof, from"\vl1ich..flling hole .there lead independent filling and.ventpassages.. 20, 21, through the Walls of the cylinder to. the foilreservoir `6; A. screw plug 2Q serves'as a closure-fe.-

the lillinghole 19. In filling the reservoir 6, the oilis poured intothe hole 19 andthe oil will flow through one of the passages,

yinto the reserif'oir while the air from the reservoir will escape.thi-onglLt-.heother passage. VA AS the rock drill is operated, .a slightamount of oil will -be.permitted to escape from the. reservoir intothepiston chamber as'the piston9-nncoi'iers the port 11. 'here 'avalve-isused,l the jar ofthe machine is suflicient to uncover the portl1 enough to allow-,the necessary oil to'pass into the pist0n Chamber. AThe ease' with which this valve maybe opened by the .jar ofthemal'cliine,pcan be controlled by the tension of its closing spring.

It is evident that -various. changesmight beresorte'd to intheconstrnction and arrangement of fthe several parts witl-iontdeparting from the spiriti 'and scopeof. my iny vention; hence do notwish to limit -m'y- 'self Strictly to the striicturefherein .set forth,but

lVhat I claim is: Y A

I1.. A rock' drill cylinderhavinw therein a ivork piston7 .its Chamber1A,an oi 'reservoir and a portgleading from the reserroirtothe pistonchamber intopo'sition to be alternately opened to 'the'. opposite sidesof the' piston as it reciprocates.

2. A' rock drill cylinder having therein a" work piston. its chamber, anoil reservoir.. :i pol-l loadingfrom 'the reservoir to the pistonchamber into position te vhe .alternately opened to the opposite sidesof the4 piston as it reciprocates and an automatic check valve foropening and closingv said port. 'y Y ,l

3'. A rock drill cylmderhaving therein a work piston,`its chamber, anoil reservoir, a port leading from the reservoir to the piston chamberAinto position Vto be alternately opened to the oppos'itesides of the.

piston as it -reciprocates and an automatic check valve for opening' andclosing said port, said check valve being opened andl `closed by "thejar due 'to -the operation of,

the drill. l

' 4. 'A rock drill cylinder, guides alng the bottom of the same,transverse vand longitudinal partitions connecting saidguides to formtogetherv with thebottom wall of the cylinder and said guides, an voilreservoir, said cylinder` having therein a work piston,

its chamber, and a port leading from the. reservoir to the pistonchamber in vposition to be'uncovered by the piston asitrecipreservoirthereinatfits bottom, between its guides, a port leading .through thetop wall 5. A rock drill cylinder, guidesalong the bottom of the same,transverse and longitudinal partitions v--c'onnecting Said guides 5toform, together with the bottom'wall of theA cylinder and said guides,lan oil reservoir,-

said cylinder having therein, a work piston,

its chamber, a port leading from the reservoir to. the piston chamber inpositionV to Y beuncovered bythe piston as it reeiprocates,

and anautomatic check valve forpopening and .closing said port.

6. A rock drill cylinder, guidesalong the bottom of *the same,transverse and longitudinal partitions connecting said uides bo forni,together with the bottom wa l of the cylinder and said guides, an oilreservoir, said 'cylinder having thereina Work pistou, tsschamber, aport leading from the reservoir to thev piston chamber in position to beuncovered by the piston as it reciprocates',

and an automatic check valvel for opening and closing said port, saidcheck valvepbeing opened and closed by the jar due to the operation ofthe drill.

7. AA rock drin Cylinder, guides along the same, said cylinder havingtherein a work, I

piston, its chamber, an -oil reservoirlocated at the bottom of thecylinder between said guides, a port leading from the reservoir tothepiston chamber, and an oil lllin hole in the cylinder havinga passageleadlng to the reservoir. v` Y 8. A rock. drill cylinder,gui'ies'alo'nglthe same, Isaid cylinder having therein a workv`plston, its'chamber, ano1l reservoir located at the bottom of the -cylinder between said thecylinder having separate passages leading Vto and from the reservoir.- g

glliideg'a port leading'from the;A reservoir to t e piston chamber, andan oil filling .holein 9.- A rock drin: cylinder having an @nass fervoir therein locatedat its bottom between its guides, a port leading"thfrough the 'top wall of the reservoir-into thepistonchamber, a pluginsertedthroughl the ,bottoml wall of the reservoir opposite said portand-a I valve for saidv gort carried 'by said plug.

l0. A rock rill cylinder having "an oil wall'thereof, saidplng having cl1annels-or` y the reservoir into communication bringi with said port.11. A rock ofthe reservoir-into the piston chamber,

drin e, under i having an 'e on' reservoir therein at 4 its bottombetween its I guides, a port leading through the top wall Y a pluginserted through'the bottom wall of the reservoir linto contact with thetopwallfl thereof, said plug having channels for bringing the reservoirinto communication with '.Sald port, .anda valve forsaid port-carried bysaid plug.

In' testimony, that Iclaim the foregoing as my invention, I have signedmy name in presence of` two witnesses, this vtwenty lninth day of June191:1.

' CHARLES c.' HANSEN.

Witnesses A y F'. v(Silicium. BARRY, A C. S. SUNDGREN;

